Then next time there's something you want to do/change she'll remember you giving in on this issue, and chances are she'll be more than reasonable.
This hasn't been my experience.
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As for Moranis' situation, this is something that he feels strongly about. It's an engrained habit that really isn't hurting anybody. If the cozy is small and unobtrusive, I think his wife looks at least as unreasonable as he does.
My wife and I have fights over stupid stuff frequently. I give in a lot, but I hold firm a lot, too. I think that if you give in all the time, you end up creating an expectation that you'll always be bull-dozed. Over time, that type of stuff leads to resentment, which unfortunately leads to all kinds of other problems in a marriage.
Marriage needs to be about give-and-take. It sounds like Moranis and Mrs. Moranis have a pretty good system worked out, since they rarely fight. However, if this is the line in the sand for both of them, I don't think the man needs to automatically give in.